6444143 has 4 divisors (see below), whose sum is σ = 6479928. Its totient is φ = 6408360.

The previous prime is 6444121. The next prime is 6444161. The reversal of 6444143 is 3414446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6444143 - 2⁶ = 6444079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17621 + ... + 17982.

It is an arithmetic number, because the mean of its divisors is an integer number (1619982).

Almost surely, 2^6444143 is an apocalyptic number.

6444143 is a deficient number, since it is larger than the sum of its proper divisors (35785).

6444143 is a wasteful number, since it uses less digits than its factorization.

6444143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35784.

The product of its digits is 4608, while the sum is 26.

The square root of 6444143 is about 2538.5316622016. The cubic root of 6444143 is about 186.0894374668.

Adding to 6444143 its reverse (3414446), we get a palindrome (9858589).

The spelling of 6444143 in words is "six million, four hundred forty-four thousand, one hundred forty-three".